Ukuhlanganiswa kwe-Alkyl polyglycoside carbonates

I-Alkyl polyglycoside carbonates yalungiswa nge-transesterification ye-alkyl monoglycosides nge-diethyl carbonate (Umfanekiso 4).Ngokwentshisekelo yokuxutshwa okuphelele kwama-reactants, kubonakale kunenzuzo ukusebenzisa i-diethyl carbonate ngokweqile ukuze isebenze kokubili njengengxenye ye-transesterification nanjenge-solvent.I-2Mole-% yesisombululo se-sodium hydroxide engu-50% yengezwa ngokudonsa phansi kule ngxube ngokushukumisa cishe ku-120 ℃.Ngemva kwamahora angu-3 ngaphansi kwe-reflux, ingxube yokusabela ivunyelwe ukuba iphole ku-80℃ futhi isuswe nge-85% phosphoric acid.I-diethyl carbonate eyeqile ikhishwa ku-vacuo.Ngaphansi kwalezi zimo zokusabela, iqembu elilodwa le-hydroxyl likhethwa ukuba libe yi-esterified.Isilinganiso se-educt esele kumikhiqizo ku-1:2.5:1(monoglycoside: Monocarbonate:Polycarbonate).

Ngaphandle kwe-monocarbonate, imikhiqizo enezinga eliphezulu lokushintshwa nayo iyakhiwa kulokhu kusabela.Izinga lokungezwa kwe-carbonate lingalawulwa ngokuphathwa okunekhono kokusabela.Ku-C₁₂ i-monoglycoside, ukusatshalaliswa kwe-mono-,di- kanye ne-tricarbonate engu-7:3:1 itholakala ngaphansi kwezimo zokusabela ezisanda kuchazwa (Umfanekiso 5).Uma isikhathi sokuphendula sikhuphuka sibe ngamahora angu-7 futhi uma ama-2moles e-ethanol ekhishwa ngaleso sikhathi, umkhiqizo oyinhloko ngu-C.₁₂ I-monoglycoside dicarbonate.Uma inyuswa ifike kumahora ayi-10 bese kuchithwa ama-moles angu-3 e-ethanol, umkhiqizo oyinhloko otholakala ekugcineni yi-tricarbonate.Izinga lokungezwa kwe-carbonate futhi yingakho ibhalansi ye-hydrophilic/lipophilic yenhlanganisela ye-alkyl polyglycoside ingalungiswa kalula ngokuhlukahluka kwesikhathi sokuphendula kanye nevolumu ye-distillate.